| 1 | /* |
| 2 | * Copyright (C) 2011 EfficiOS Inc. |
| 3 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0-only |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #include <getopt.h> |
| 10 | #include <signal.h> |
| 11 | #include <stdio.h> |
| 12 | #include <stdlib.h> |
| 13 | #include <string.h> |
| 14 | #include <sys/stat.h> |
| 15 | #include <sys/types.h> |
| 16 | #include <sys/stat.h> |
| 17 | #include <sys/mman.h> |
| 18 | #include <fcntl.h> |
| 19 | #include <sys/wait.h> |
| 20 | #include <unistd.h> |
| 21 | #include <ctype.h> |
| 22 | #include <dirent.h> |
| 23 | #include <common/compat/endian.hpp> |
| 24 | #include <inttypes.h> |
| 25 | #include <stdbool.h> |
| 26 | |
| 27 | #include <version.hpp> |
| 28 | #include <lttng/lttng.h> |
| 29 | #include <common/common.hpp> |
| 30 | #include <common/spawn-viewer.hpp> |
| 31 | #include <common/utils.hpp> |
| 32 | |
| 33 | #define COPY_BUFLEN 4096 |
| 34 | #define RB_CRASH_DUMP_ABI_LEN 32 |
| 35 | |
| 36 | #define RB_CRASH_DUMP_ABI_MAGIC_LEN 16 |
| 37 | |
| 38 | /* |
| 39 | * The 128-bit magic number is xor'd in the process data so it does not |
| 40 | * cause a false positive when searching for buffers by scanning memory. |
| 41 | * The actual magic number is: |
| 42 | * 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, 0x7B, 0xF1, |
| 43 | * 0x77, 0xBF, 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, |
| 44 | */ |
| 45 | #define RB_CRASH_DUMP_ABI_MAGIC_XOR \ |
| 46 | { \ |
| 47 | 0x17 ^ 0xFF, 0x7B ^ 0xFF, 0xF1 ^ 0xFF, 0x77 ^ 0xFF, \ |
| 48 | 0xBF ^ 0xFF, 0x17 ^ 0xFF, 0x7B ^ 0xFF, 0xF1 ^ 0xFF, \ |
| 49 | 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, 0x7B ^ 0xFF, \ |
| 50 | 0xF1 ^ 0xFF, 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, \ |
| 51 | } |
| 52 | |
| 53 | static const char *help_msg = |
| 54 | #ifdef LTTNG_EMBED_HELP |
| 55 | #include <lttng-crash.1.h> |
| 56 | #else |
| 57 | NULL |
| 58 | #endif |
| 59 | ; |
| 60 | |
| 61 | /* |
| 62 | * Non-static to ensure the compiler does not optimize away the xor. |
| 63 | */ |
| 64 | uint8_t lttng_crash_expected_magic_xor[] = RB_CRASH_DUMP_ABI_MAGIC_XOR; |
| 65 | |
| 66 | #define RB_CRASH_ENDIAN 0x1234 |
| 67 | #define RB_CRASH_ENDIAN_REVERSE 0x3412 |
| 68 | |
| 69 | enum lttng_crash_type { |
| 70 | LTTNG_CRASH_TYPE_UST = 0, |
| 71 | LTTNG_CRASH_TYPE_KERNEL = 1, |
| 72 | }; |
| 73 | |
| 74 | /* LTTng ring buffer defines (copied) */ |
| 75 | |
| 76 | #define HALF_ULONG_BITS(wl) (((wl) * CHAR_BIT) >> 1) |
| 77 | |
| 78 | #define SB_ID_OFFSET_SHIFT(wl) (HALF_ULONG_BITS(wl) + 1) |
| 79 | #define SB_ID_OFFSET_COUNT(wl) (1UL << SB_ID_OFFSET_SHIFT(wl)) |
| 80 | #define SB_ID_OFFSET_MASK(wl) (~(SB_ID_OFFSET_COUNT(wl) - 1)) |
| 81 | /* |
| 82 | * Lowest bit of top word half belongs to noref. Used only for overwrite mode. |
| 83 | */ |
| 84 | #define SB_ID_NOREF_SHIFT(wl) (SB_ID_OFFSET_SHIFT(wl) - 1) |
| 85 | #define SB_ID_NOREF_COUNT(wl) (1UL << SB_ID_NOREF_SHIFT(wl)) |
| 86 | #define SB_ID_NOREF_MASK(wl) SB_ID_NOREF_COUNT(wl) |
| 87 | /* |
| 88 | * In overwrite mode: lowest half of word is used for index. |
| 89 | * Limit of 2^16 subbuffers per buffer on 32-bit, 2^32 on 64-bit. |
| 90 | * In producer-consumer mode: whole word used for index. |
| 91 | */ |
| 92 | #define SB_ID_INDEX_SHIFT(wl) 0 |
| 93 | #define SB_ID_INDEX_COUNT(wl) (1UL << SB_ID_INDEX_SHIFT(wl)) |
| 94 | #define SB_ID_INDEX_MASK(wl) (SB_ID_NOREF_COUNT(wl) - 1) |
| 95 | |
| 96 | enum rb_modes { |
| 97 | RING_BUFFER_OVERWRITE = 0, /* Overwrite when buffer full */ |
| 98 | RING_BUFFER_DISCARD = 1, /* Discard when buffer full */ |
| 99 | }; |
| 100 | |
| 101 | namespace { |
| 102 | struct crash_abi_unknown { |
| 103 | uint8_t magic[RB_CRASH_DUMP_ABI_MAGIC_LEN]; |
| 104 | uint64_t mmap_length; /* Overall length of crash record */ |
| 105 | uint16_t endian; /* |
| 106 | * { 0x12, 0x34 }: big endian |
| 107 | * { 0x34, 0x12 }: little endian |
| 108 | */ |
| 109 | uint16_t major; /* Major number. */ |
| 110 | uint16_t minor; /* Minor number. */ |
| 111 | uint8_t word_size; /* Word size (bytes). */ |
| 112 | uint8_t layout_type; /* enum lttng_crash_layout */ |
| 113 | } __attribute__((packed)); |
| 114 | |
| 115 | struct crash_abi_0_0 { |
| 116 | struct crash_abi_unknown parent; |
| 117 | |
| 118 | struct { |
| 119 | uint32_t prod_offset; |
| 120 | uint32_t consumed_offset; |
| 121 | uint32_t commit_hot_array; |
| 122 | uint32_t commit_hot_seq; |
| 123 | uint32_t buf_wsb_array; |
| 124 | uint32_t buf_wsb_id; |
| 125 | uint32_t sb_array; |
| 126 | uint32_t sb_array_shmp_offset; |
| 127 | uint32_t sb_backend_p_offset; |
| 128 | uint32_t content_size; |
| 129 | uint32_t packet_size; |
| 130 | } __attribute__((packed)) offset; |
| 131 | struct { |
| 132 | uint8_t prod_offset; |
| 133 | uint8_t consumed_offset; |
| 134 | uint8_t commit_hot_seq; |
| 135 | uint8_t buf_wsb_id; |
| 136 | uint8_t sb_array_shmp_offset; |
| 137 | uint8_t sb_backend_p_offset; |
| 138 | uint8_t content_size; |
| 139 | uint8_t packet_size; |
| 140 | } __attribute__((packed)) length; |
| 141 | struct { |
| 142 | uint32_t commit_hot_array; |
| 143 | uint32_t buf_wsb_array; |
| 144 | uint32_t sb_array; |
| 145 | } __attribute__((packed)) stride; |
| 146 | |
| 147 | uint64_t buf_size; /* Size of the buffer */ |
| 148 | uint64_t subbuf_size; /* Sub-buffer size */ |
| 149 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ |
| 150 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ |
| 151 | } __attribute__((packed)); |
| 152 | |
| 153 | struct lttng_crash_layout { |
| 154 | struct { |
| 155 | int prod_offset, consumed_offset, |
| 156 | commit_hot_array, commit_hot_seq, |
| 157 | buf_wsb_array, buf_wsb_id, |
| 158 | sb_array, sb_array_shmp_offset, |
| 159 | sb_backend_p_offset, content_size, |
| 160 | packet_size; |
| 161 | } offset; |
| 162 | struct { |
| 163 | int prod_offset, consumed_offset, |
| 164 | commit_hot_seq, buf_wsb_id, |
| 165 | sb_array_shmp_offset, sb_backend_p_offset, |
| 166 | content_size, packet_size; |
| 167 | } length; |
| 168 | struct { |
| 169 | int commit_hot_array, buf_wsb_array, sb_array; |
| 170 | } stride; |
| 171 | |
| 172 | int reverse_byte_order; |
| 173 | int word_size; |
| 174 | |
| 175 | uint64_t mmap_length; /* Length of crash record */ |
| 176 | uint64_t buf_size; /* Size of the buffer */ |
| 177 | uint64_t subbuf_size; /* Sub-buffer size */ |
| 178 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ |
| 179 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ |
| 180 | }; |
| 181 | } /* namespace */ |
| 182 | |
| 183 | /* Variables */ |
| 184 | static const char *progname; |
| 185 | static char *opt_viewer_path = NULL; |
| 186 | static char *opt_output_path = NULL; |
| 187 | |
| 188 | static char *the_input_path; |
| 189 | |
| 190 | int lttng_opt_quiet, lttng_opt_verbose, lttng_opt_mi; |
| 191 | |
| 192 | enum { |
| 193 | OPT_DUMP_OPTIONS, |
| 194 | }; |
| 195 | |
| 196 | /* Getopt options. No first level command. */ |
| 197 | static struct option long_options[] = { |
| 198 | { "version", 0, NULL, 'V' }, |
| 199 | { "help", 0, NULL, 'h' }, |
| 200 | { "verbose", 0, NULL, 'v' }, |
| 201 | { "viewer", 1, NULL, 'e' }, |
| 202 | { "extract", 1, NULL, 'x' }, |
| 203 | { "list-options", 0, NULL, OPT_DUMP_OPTIONS }, |
| 204 | { NULL, 0, NULL, 0 }, |
| 205 | }; |
| 206 | |
| 207 | static void usage(void) |
| 208 | { |
| 209 | int ret = utils_show_help(1, "lttng-crash", help_msg); |
| 210 | |
| 211 | if (ret) { |
| 212 | ERR("Cannot show --help for `lttng-crash`"); |
| 213 | perror("exec"); |
| 214 | exit(EXIT_FAILURE); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | static void version(FILE *ofp) |
| 219 | { |
| 220 | fprintf(ofp, "%s (LTTng Crash Trace Viewer) " VERSION " - " VERSION_NAME |
| 221 | "%s%s\n", |
| 222 | progname, |
| 223 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, |
| 224 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * list_options |
| 229 | * |
| 230 | * List options line by line. This is mostly for bash auto completion and to |
| 231 | * avoid difficult parsing. |
| 232 | */ |
| 233 | static void list_options(FILE *ofp) |
| 234 | { |
| 235 | int i = 0; |
| 236 | struct option *option = NULL; |
| 237 | |
| 238 | option = &long_options[i]; |
| 239 | while (option->name != NULL) { |
| 240 | fprintf(ofp, "--%s\n", option->name); |
| 241 | |
| 242 | if (isprint(option->val)) { |
| 243 | fprintf(ofp, "-%c\n", option->val); |
| 244 | } |
| 245 | |
| 246 | i++; |
| 247 | option = &long_options[i]; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /* |
| 252 | * Parse command line arguments. |
| 253 | * |
| 254 | * Return 0 if OK, else -1 |
| 255 | */ |
| 256 | static int parse_args(int argc, char **argv) |
| 257 | { |
| 258 | int opt, ret = 0; |
| 259 | |
| 260 | if (argc < 2) { |
| 261 | usage(); |
| 262 | exit(EXIT_FAILURE); |
| 263 | } |
| 264 | |
| 265 | while ((opt = getopt_long(argc, argv, "+Vhve:x:", long_options, NULL)) != -1) { |
| 266 | switch (opt) { |
| 267 | case 'V': |
| 268 | version(stdout); |
| 269 | ret = 1; |
| 270 | goto end; |
| 271 | case 'h': |
| 272 | usage(); |
| 273 | ret = 1; |
| 274 | goto end; |
| 275 | case 'v': |
| 276 | /* There is only 3 possible level of verbosity. (-vvv) */ |
| 277 | if (lttng_opt_verbose < 3) { |
| 278 | lttng_opt_verbose += 1; |
| 279 | } |
| 280 | break; |
| 281 | case 'e': |
| 282 | free(opt_viewer_path); |
| 283 | opt_viewer_path = strdup(optarg); |
| 284 | break; |
| 285 | case 'x': |
| 286 | free(opt_output_path); |
| 287 | opt_output_path = strdup(optarg); |
| 288 | break; |
| 289 | case OPT_DUMP_OPTIONS: |
| 290 | list_options(stdout); |
| 291 | ret = 1; |
| 292 | goto end; |
| 293 | default: |
| 294 | ERR("Unknown command-line option"); |
| 295 | goto error; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | /* No leftovers, or more than one input path, print usage and quit */ |
| 300 | if (argc - optind != 1) { |
| 301 | ERR("Command-line error: Specify exactly one input path"); |
| 302 | goto error; |
| 303 | } |
| 304 | |
| 305 | the_input_path = argv[optind]; |
| 306 | end: |
| 307 | return ret; |
| 308 | |
| 309 | error: |
| 310 | return -1; |
| 311 | } |
| 312 | |
| 313 | static |
| 314 | int copy_file(const char *file_dest, const char *file_src) |
| 315 | { |
| 316 | int fd_src = -1, fd_dest = -1; |
| 317 | ssize_t readlen, writelen; |
| 318 | char buf[COPY_BUFLEN]; |
| 319 | int ret; |
| 320 | |
| 321 | DBG("Copy metadata file '%s' into '%s'", file_src, file_dest); |
| 322 | |
| 323 | fd_src = open(file_src, O_RDONLY); |
| 324 | if (fd_src < 0) { |
| 325 | PERROR("Error opening %s for reading", file_src); |
| 326 | ret = -errno; |
| 327 | goto error; |
| 328 | } |
| 329 | fd_dest = open(file_dest, O_RDWR | O_CREAT | O_EXCL, |
| 330 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
| 331 | if (fd_dest < 0) { |
| 332 | PERROR("Error opening %s for writing", file_dest); |
| 333 | ret = -errno; |
| 334 | goto error; |
| 335 | } |
| 336 | |
| 337 | for (;;) { |
| 338 | readlen = lttng_read(fd_src, buf, COPY_BUFLEN); |
| 339 | if (readlen < 0) { |
| 340 | PERROR("Error reading input file"); |
| 341 | ret = -1; |
| 342 | goto error; |
| 343 | } |
| 344 | if (!readlen) { |
| 345 | break; |
| 346 | } |
| 347 | writelen = lttng_write(fd_dest, buf, readlen); |
| 348 | if (writelen < readlen) { |
| 349 | PERROR("Error writing to output file"); |
| 350 | ret = -1; |
| 351 | goto error; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | ret = 0; |
| 356 | error: |
| 357 | if (fd_src >= 0) { |
| 358 | if (close(fd_src) < 0) { |
| 359 | PERROR("Error closing %s", file_src); |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | if (fd_dest >= 0) { |
| 364 | if (close(fd_dest) < 0) { |
| 365 | PERROR("Error closing %s", file_dest); |
| 366 | } |
| 367 | } |
| 368 | return ret; |
| 369 | } |
| 370 | |
| 371 | static |
| 372 | uint64_t _crash_get_field(const struct lttng_crash_layout *layout, |
| 373 | const char *ptr, size_t size) |
| 374 | { |
| 375 | switch (size) { |
| 376 | case 1: return *(uint8_t *) ptr; |
| 377 | case 2: if (layout->reverse_byte_order) { |
| 378 | return bswap_16(*(uint16_t *) ptr); |
| 379 | } else { |
| 380 | return *(uint16_t *) ptr; |
| 381 | |
| 382 | } |
| 383 | case 4: if (layout->reverse_byte_order) { |
| 384 | return bswap_32(*(uint32_t *) ptr); |
| 385 | } else { |
| 386 | return *(uint32_t *) ptr; |
| 387 | |
| 388 | } |
| 389 | case 8: if (layout->reverse_byte_order) { |
| 390 | return bswap_64(*(uint64_t *) ptr); |
| 391 | } else { |
| 392 | return *(uint64_t *) ptr; |
| 393 | } |
| 394 | default: |
| 395 | abort(); |
| 396 | return -1; |
| 397 | } |
| 398 | |
| 399 | } |
| 400 | |
| 401 | #define crash_get_field(layout, map, name) \ |
| 402 | _crash_get_field(layout, (map) + (layout)->offset.name, \ |
| 403 | layout->length.name) |
| 404 | |
| 405 | #define crash_get_array_field(layout, map, array_name, idx, field_name) \ |
| 406 | _crash_get_field(layout, \ |
| 407 | (map) + (layout)->offset.array_name \ |
| 408 | + (idx * (layout)->stride.array_name) \ |
| 409 | + (layout)->offset.field_name, \ |
| 410 | (layout)->length.field_name) |
| 411 | |
| 412 | #define crash_get_hdr_raw_field(layout, hdr, name) ((hdr)->name) |
| 413 | |
| 414 | #define crash_get_hdr_field(layout, hdr, name) \ |
| 415 | _crash_get_field(layout, (const char *) &(hdr)->name, \ |
| 416 | sizeof((hdr)->name)) |
| 417 | |
| 418 | #define crash_get_layout(layout, hdr, name) \ |
| 419 | do { \ |
| 420 | (layout)->name = crash_get_hdr_field(layout, hdr, \ |
| 421 | name); \ |
| 422 | DBG("layout.%s = %" PRIu64, #name, \ |
| 423 | (uint64_t) (layout)->name); \ |
| 424 | } while (0) |
| 425 | |
| 426 | static |
| 427 | int get_crash_layout_0_0(struct lttng_crash_layout *layout, |
| 428 | char *map) |
| 429 | { |
| 430 | const struct crash_abi_0_0 *abi = (const struct crash_abi_0_0 *) map; |
| 431 | |
| 432 | crash_get_layout(layout, abi, offset.prod_offset); |
| 433 | crash_get_layout(layout, abi, offset.consumed_offset); |
| 434 | crash_get_layout(layout, abi, offset.commit_hot_array); |
| 435 | crash_get_layout(layout, abi, offset.commit_hot_seq); |
| 436 | crash_get_layout(layout, abi, offset.buf_wsb_array); |
| 437 | crash_get_layout(layout, abi, offset.buf_wsb_id); |
| 438 | crash_get_layout(layout, abi, offset.sb_array); |
| 439 | crash_get_layout(layout, abi, offset.sb_array_shmp_offset); |
| 440 | crash_get_layout(layout, abi, offset.sb_backend_p_offset); |
| 441 | crash_get_layout(layout, abi, offset.content_size); |
| 442 | crash_get_layout(layout, abi, offset.packet_size); |
| 443 | |
| 444 | crash_get_layout(layout, abi, length.prod_offset); |
| 445 | crash_get_layout(layout, abi, length.consumed_offset); |
| 446 | crash_get_layout(layout, abi, length.commit_hot_seq); |
| 447 | crash_get_layout(layout, abi, length.buf_wsb_id); |
| 448 | crash_get_layout(layout, abi, length.sb_array_shmp_offset); |
| 449 | crash_get_layout(layout, abi, length.sb_backend_p_offset); |
| 450 | crash_get_layout(layout, abi, length.content_size); |
| 451 | crash_get_layout(layout, abi, length.packet_size); |
| 452 | |
| 453 | crash_get_layout(layout, abi, stride.commit_hot_array); |
| 454 | crash_get_layout(layout, abi, stride.buf_wsb_array); |
| 455 | crash_get_layout(layout, abi, stride.sb_array); |
| 456 | |
| 457 | crash_get_layout(layout, abi, buf_size); |
| 458 | crash_get_layout(layout, abi, subbuf_size); |
| 459 | crash_get_layout(layout, abi, num_subbuf); |
| 460 | crash_get_layout(layout, abi, mode); |
| 461 | |
| 462 | return 0; |
| 463 | } |
| 464 | |
| 465 | static |
| 466 | void print_dbg_magic(const uint8_t *magic) |
| 467 | { |
| 468 | DBG("magic: 0x%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X", |
| 469 | magic[0], magic[1], magic[2], magic[3], |
| 470 | magic[4], magic[5], magic[6], magic[7], |
| 471 | magic[8], magic[9], magic[10], magic[11], |
| 472 | magic[12], magic[13], magic[14], magic[15]); |
| 473 | } |
| 474 | |
| 475 | static |
| 476 | int check_magic(const uint8_t *magic) |
| 477 | { |
| 478 | int i; |
| 479 | |
| 480 | for (i = 0; i < RB_CRASH_DUMP_ABI_MAGIC_LEN; i++) { |
| 481 | if ((magic[i] ^ 0xFF) != lttng_crash_expected_magic_xor[i]) { |
| 482 | return -1; |
| 483 | } |
| 484 | } |
| 485 | return 0; |
| 486 | } |
| 487 | |
| 488 | static |
| 489 | int get_crash_layout(struct lttng_crash_layout *layout, int fd, |
| 490 | const char *input_file) |
| 491 | { |
| 492 | char *map; |
| 493 | int ret = 0, unmapret; |
| 494 | const uint8_t *magic; |
| 495 | uint64_t mmap_length; |
| 496 | uint16_t major, minor; |
| 497 | uint8_t word_size; |
| 498 | const struct crash_abi_unknown *abi; |
| 499 | uint16_t endian; |
| 500 | enum lttng_crash_type layout_type; |
| 501 | struct stat stat; |
| 502 | |
| 503 | ret = fstat(fd, &stat); |
| 504 | if (ret < 0) { |
| 505 | PERROR("Failed to fstat '%s'", input_file); |
| 506 | return -1; |
| 507 | } |
| 508 | if (stat.st_size < RB_CRASH_DUMP_ABI_LEN) { |
| 509 | ERR("File '%s' truncated: file length of %" PRIi64 |
| 510 | " bytes does not meet the minimal expected " |
| 511 | "length of %d bytes", |
| 512 | input_file, (int64_t) stat.st_size, |
| 513 | RB_CRASH_DUMP_ABI_LEN); |
| 514 | return -1; |
| 515 | } |
| 516 | map = (char *) mmap(NULL, RB_CRASH_DUMP_ABI_LEN, PROT_READ, MAP_PRIVATE, |
| 517 | fd, 0); |
| 518 | if (map == MAP_FAILED) { |
| 519 | PERROR("Mapping file"); |
| 520 | return -1; |
| 521 | } |
| 522 | abi = (const struct crash_abi_unknown *) map; |
| 523 | magic = crash_get_hdr_raw_field(layout, abi, magic); |
| 524 | print_dbg_magic(magic); |
| 525 | if (check_magic(magic)) { |
| 526 | DBG("Unknown magic number"); |
| 527 | ret = 1; /* positive return value, skip */ |
| 528 | goto end; |
| 529 | } |
| 530 | endian = crash_get_hdr_field(layout, abi, endian); |
| 531 | switch (endian) { |
| 532 | case RB_CRASH_ENDIAN: |
| 533 | break; |
| 534 | case RB_CRASH_ENDIAN_REVERSE: |
| 535 | layout->reverse_byte_order = 1; |
| 536 | break; |
| 537 | default: |
| 538 | DBG("Unknown endianness value: 0x%X", (unsigned int) endian); |
| 539 | ret = 1; /* positive return value, skip */ |
| 540 | goto end; |
| 541 | } |
| 542 | layout_type = (enum lttng_crash_type) crash_get_hdr_field(layout, abi, layout_type); |
| 543 | switch (layout_type) { |
| 544 | case LTTNG_CRASH_TYPE_UST: |
| 545 | break; |
| 546 | case LTTNG_CRASH_TYPE_KERNEL: |
| 547 | ERR("lttng-modules buffer layout support not implemented"); |
| 548 | ret = 1; /* positive return value, skip */ |
| 549 | goto end; |
| 550 | default: |
| 551 | ERR("Unknown layout type %u", (unsigned int) layout_type); |
| 552 | ret = 1; /* positive return value, skip */ |
| 553 | goto end; |
| 554 | } |
| 555 | mmap_length = crash_get_hdr_field(layout, abi, mmap_length); |
| 556 | DBG("mmap_length: %" PRIu64, mmap_length); |
| 557 | layout->mmap_length = mmap_length; |
| 558 | major = crash_get_hdr_field(layout, abi, major); |
| 559 | DBG("major: %u", major); |
| 560 | minor = crash_get_hdr_field(layout, abi, minor); |
| 561 | DBG("minor: %u", minor); |
| 562 | word_size = crash_get_hdr_field(layout, abi, word_size); |
| 563 | DBG("word_size: %u", word_size); |
| 564 | switch (major) { |
| 565 | case 0: |
| 566 | switch (minor) { |
| 567 | case 0: |
| 568 | ret = get_crash_layout_0_0(layout, map); |
| 569 | if (ret) |
| 570 | goto end; |
| 571 | break; |
| 572 | default: |
| 573 | ret = -1; |
| 574 | ERR("Unsupported crash ABI %u.%u\n", major, minor); |
| 575 | goto end; |
| 576 | } |
| 577 | break; |
| 578 | default: |
| 579 | ERR("Unsupported crash ABI %u.%u\n", major, minor); |
| 580 | ret = -1; |
| 581 | goto end; |
| 582 | } |
| 583 | layout->word_size = word_size; |
| 584 | end: |
| 585 | unmapret = munmap(map, RB_CRASH_DUMP_ABI_LEN); |
| 586 | if (unmapret) { |
| 587 | PERROR("munmap"); |
| 588 | } |
| 589 | return ret; |
| 590 | } |
| 591 | |
| 592 | /* buf_trunc mask selects only the buffer number. */ |
| 593 | static inline |
| 594 | uint64_t buf_trunc(uint64_t offset, uint64_t buf_size) |
| 595 | { |
| 596 | return offset & ~(buf_size - 1); |
| 597 | } |
| 598 | |
| 599 | /* subbuf_trunc mask selects the subbuffer number. */ |
| 600 | static inline |
| 601 | uint64_t subbuf_trunc(uint64_t offset, uint64_t subbuf_size) |
| 602 | { |
| 603 | return offset & ~(subbuf_size - 1); |
| 604 | } |
| 605 | |
| 606 | /* buf_offset mask selects only the offset within the current buffer. */ |
| 607 | static inline |
| 608 | uint64_t buf_offset(uint64_t offset, uint64_t buf_size) |
| 609 | { |
| 610 | return offset & (buf_size - 1); |
| 611 | } |
| 612 | |
| 613 | /* subbuf_offset mask selects the offset within the current subbuffer. */ |
| 614 | static inline |
| 615 | uint64_t subbuf_offset(uint64_t offset, uint64_t subbuf_size) |
| 616 | { |
| 617 | return offset & (subbuf_size - 1); |
| 618 | } |
| 619 | |
| 620 | /* subbuf_index returns the index of the current subbuffer within the buffer. */ |
| 621 | static inline |
| 622 | uint64_t subbuf_index(uint64_t offset, uint64_t buf_size, uint64_t subbuf_size) |
| 623 | { |
| 624 | return buf_offset(offset, buf_size) / subbuf_size; |
| 625 | } |
| 626 | |
| 627 | static inline |
| 628 | uint64_t subbuffer_id_get_index(uint32_t mode, uint64_t id, |
| 629 | unsigned int wl) |
| 630 | { |
| 631 | if (mode == RING_BUFFER_OVERWRITE) |
| 632 | return id & SB_ID_INDEX_MASK(wl); |
| 633 | else |
| 634 | return id; |
| 635 | } |
| 636 | |
| 637 | static |
| 638 | int copy_crash_subbuf(const struct lttng_crash_layout *layout, |
| 639 | int fd_dest, char *buf, uint64_t offset) |
| 640 | { |
| 641 | uint64_t buf_size, subbuf_size, num_subbuf, sbidx, id, |
| 642 | sb_bindex, rpages_offset, p_offset, seq_cc, |
| 643 | committed, commit_count_mask, consumed_cur, |
| 644 | packet_size; |
| 645 | char *subbuf_ptr; |
| 646 | ssize_t writelen; |
| 647 | |
| 648 | /* |
| 649 | * Get the current subbuffer by applying the proper mask to |
| 650 | * "offset", and looking up the subbuf location within the |
| 651 | * source file buf. |
| 652 | */ |
| 653 | |
| 654 | buf_size = layout->buf_size; |
| 655 | subbuf_size = layout->subbuf_size; |
| 656 | num_subbuf = layout->num_subbuf; |
| 657 | |
| 658 | switch (layout->word_size) { |
| 659 | case 4: commit_count_mask = 0xFFFFFFFFULL / num_subbuf; |
| 660 | break; |
| 661 | case 8: commit_count_mask = 0xFFFFFFFFFFFFFFFFULL / num_subbuf; |
| 662 | break; |
| 663 | default: |
| 664 | ERR("Unsupported word size: %u", |
| 665 | (unsigned int) layout->word_size); |
| 666 | return -EINVAL; |
| 667 | } |
| 668 | |
| 669 | DBG("Copy crash subbuffer at offset %" PRIu64, offset); |
| 670 | sbidx = subbuf_index(offset, buf_size, subbuf_size); |
| 671 | |
| 672 | /* |
| 673 | * Find where the seq cc is located. Compute length of data to |
| 674 | * copy. |
| 675 | */ |
| 676 | seq_cc = crash_get_array_field(layout, buf, commit_hot_array, |
| 677 | sbidx, commit_hot_seq); |
| 678 | consumed_cur = crash_get_field(layout, buf, consumed_offset); |
| 679 | |
| 680 | /* |
| 681 | * Check that the buffer we are getting is after or at |
| 682 | * consumed_cur position. |
| 683 | */ |
| 684 | if ((long) subbuf_trunc(offset, subbuf_size) |
| 685 | - (long) subbuf_trunc(consumed_cur, subbuf_size) < 0) { |
| 686 | DBG("No data: position is before consumed_cur"); |
| 687 | goto nodata; |
| 688 | } |
| 689 | |
| 690 | /* |
| 691 | * Check if subbuffer has been fully committed. |
| 692 | */ |
| 693 | if (((seq_cc - subbuf_size) & commit_count_mask) |
| 694 | - (buf_trunc(offset, buf_size) / num_subbuf) |
| 695 | == 0) { |
| 696 | committed = subbuf_size; |
| 697 | } else { |
| 698 | committed = subbuf_offset(seq_cc, subbuf_size); |
| 699 | if (!committed) { |
| 700 | DBG("No data committed, seq_cc: %" PRIu64, seq_cc); |
| 701 | goto nodata; |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | /* Find actual physical offset in subbuffer table */ |
| 706 | id = crash_get_array_field(layout, buf, buf_wsb_array, |
| 707 | sbidx, buf_wsb_id); |
| 708 | sb_bindex = subbuffer_id_get_index(layout->mode, id, |
| 709 | layout->word_size); |
| 710 | rpages_offset = crash_get_array_field(layout, buf, sb_array, |
| 711 | sb_bindex, sb_array_shmp_offset); |
| 712 | p_offset = crash_get_field(layout, buf + rpages_offset, |
| 713 | sb_backend_p_offset); |
| 714 | subbuf_ptr = buf + p_offset; |
| 715 | |
| 716 | if (committed == subbuf_size) { |
| 717 | /* |
| 718 | * Packet header can be used. |
| 719 | */ |
| 720 | if (layout->length.packet_size) { |
| 721 | memcpy(&packet_size, |
| 722 | subbuf_ptr + layout->offset.packet_size, |
| 723 | layout->length.packet_size); |
| 724 | if (layout->reverse_byte_order) { |
| 725 | packet_size = bswap_64(packet_size); |
| 726 | } |
| 727 | packet_size /= CHAR_BIT; |
| 728 | } else { |
| 729 | packet_size = subbuf_size; |
| 730 | } |
| 731 | } else { |
| 732 | uint64_t patch_size; |
| 733 | |
| 734 | /* |
| 735 | * Find where to patch the sub-buffer header with actual |
| 736 | * readable data len and packet len, derived from seq |
| 737 | * cc. Patch it in our in-memory copy. |
| 738 | */ |
| 739 | patch_size = committed * CHAR_BIT; |
| 740 | if (layout->reverse_byte_order) { |
| 741 | patch_size = bswap_64(patch_size); |
| 742 | } |
| 743 | if (layout->length.content_size) { |
| 744 | memcpy(subbuf_ptr + layout->offset.content_size, |
| 745 | &patch_size, layout->length.content_size); |
| 746 | } |
| 747 | if (layout->length.packet_size) { |
| 748 | memcpy(subbuf_ptr + layout->offset.packet_size, |
| 749 | &patch_size, layout->length.packet_size); |
| 750 | } |
| 751 | packet_size = committed; |
| 752 | } |
| 753 | |
| 754 | /* |
| 755 | * Copy packet into fd_dest. |
| 756 | */ |
| 757 | writelen = lttng_write(fd_dest, subbuf_ptr, packet_size); |
| 758 | if (writelen < packet_size) { |
| 759 | PERROR("Error writing to output file"); |
| 760 | return -1; |
| 761 | } |
| 762 | DBG("Copied %" PRIu64 " bytes of data", packet_size); |
| 763 | return 0; |
| 764 | |
| 765 | nodata: |
| 766 | return -ENODATA; |
| 767 | } |
| 768 | |
| 769 | static |
| 770 | int copy_crash_data(const struct lttng_crash_layout *layout, int fd_dest, |
| 771 | int fd_src) |
| 772 | { |
| 773 | char *buf; |
| 774 | int ret = 0, has_data = 0; |
| 775 | struct stat statbuf; |
| 776 | size_t src_file_len; |
| 777 | uint64_t prod_offset, consumed_offset; |
| 778 | uint64_t offset, subbuf_size; |
| 779 | ssize_t readlen; |
| 780 | |
| 781 | ret = fstat(fd_src, &statbuf); |
| 782 | if (ret) { |
| 783 | return ret; |
| 784 | } |
| 785 | src_file_len = layout->mmap_length; |
| 786 | buf = calloc<char>(src_file_len); |
| 787 | if (!buf) { |
| 788 | return -1; |
| 789 | } |
| 790 | readlen = lttng_read(fd_src, buf, src_file_len); |
| 791 | if (readlen < 0) { |
| 792 | PERROR("Error reading input file"); |
| 793 | ret = -1; |
| 794 | goto end; |
| 795 | } |
| 796 | |
| 797 | prod_offset = crash_get_field(layout, buf, prod_offset); |
| 798 | DBG("prod_offset: 0x%" PRIx64, prod_offset); |
| 799 | consumed_offset = crash_get_field(layout, buf, consumed_offset); |
| 800 | DBG("consumed_offset: 0x%" PRIx64, consumed_offset); |
| 801 | subbuf_size = layout->subbuf_size; |
| 802 | |
| 803 | for (offset = consumed_offset; offset < prod_offset; |
| 804 | offset += subbuf_size) { |
| 805 | ret = copy_crash_subbuf(layout, fd_dest, buf, offset); |
| 806 | if (!ret) { |
| 807 | has_data = 1; |
| 808 | } |
| 809 | if (ret) { |
| 810 | goto end; |
| 811 | } |
| 812 | } |
| 813 | end: |
| 814 | free(buf); |
| 815 | if (ret && ret != -ENODATA) { |
| 816 | return ret; |
| 817 | } |
| 818 | if (has_data) { |
| 819 | return 0; |
| 820 | } else { |
| 821 | return -ENODATA; |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | static |
| 826 | int extract_file(int output_dir_fd, const char *output_file, |
| 827 | int input_dir_fd, const char *input_file) |
| 828 | { |
| 829 | int fd_dest, fd_src, ret = 0, closeret; |
| 830 | struct lttng_crash_layout layout; |
| 831 | |
| 832 | layout.reverse_byte_order = 0; /* For reading magic number */ |
| 833 | |
| 834 | DBG("Extract file '%s'", input_file); |
| 835 | fd_src = openat(input_dir_fd, input_file, O_RDONLY); |
| 836 | if (fd_src < 0) { |
| 837 | PERROR("Error opening '%s' for reading", |
| 838 | input_file); |
| 839 | ret = -1; |
| 840 | goto end; |
| 841 | } |
| 842 | |
| 843 | /* Query the crash ABI layout */ |
| 844 | ret = get_crash_layout(&layout, fd_src, input_file); |
| 845 | if (ret) { |
| 846 | goto close_src; |
| 847 | } |
| 848 | |
| 849 | fd_dest = openat(output_dir_fd, output_file, |
| 850 | O_RDWR | O_CREAT | O_EXCL, |
| 851 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
| 852 | if (fd_dest < 0) { |
| 853 | PERROR("Error opening '%s' for writing", |
| 854 | output_file); |
| 855 | ret = -1; |
| 856 | goto close_src; |
| 857 | } |
| 858 | |
| 859 | ret = copy_crash_data(&layout, fd_dest, fd_src); |
| 860 | if (ret) { |
| 861 | goto close_dest; |
| 862 | } |
| 863 | |
| 864 | close_dest: |
| 865 | closeret = close(fd_dest); |
| 866 | if (closeret) { |
| 867 | PERROR("close"); |
| 868 | } |
| 869 | if (ret == -ENODATA) { |
| 870 | closeret = unlinkat(output_dir_fd, output_file, 0); |
| 871 | if (closeret) { |
| 872 | PERROR("unlinkat"); |
| 873 | } |
| 874 | } |
| 875 | close_src: |
| 876 | closeret = close(fd_src); |
| 877 | if (closeret) { |
| 878 | PERROR("close"); |
| 879 | } |
| 880 | end: |
| 881 | return ret; |
| 882 | } |
| 883 | |
| 884 | static |
| 885 | int extract_all_files(const char *output_path, |
| 886 | const char *input_path) |
| 887 | { |
| 888 | DIR *input_dir, *output_dir; |
| 889 | int input_dir_fd, output_dir_fd, ret = 0, closeret; |
| 890 | struct dirent *entry; /* input */ |
| 891 | |
| 892 | /* Open input directory */ |
| 893 | input_dir = opendir(input_path); |
| 894 | if (!input_dir) { |
| 895 | PERROR("Cannot open '%s' path", input_path); |
| 896 | return -1; |
| 897 | } |
| 898 | input_dir_fd = dirfd(input_dir); |
| 899 | if (input_dir_fd < 0) { |
| 900 | PERROR("dirfd"); |
| 901 | return -1; |
| 902 | } |
| 903 | |
| 904 | /* Open output directory */ |
| 905 | output_dir = opendir(output_path); |
| 906 | if (!output_dir) { |
| 907 | PERROR("Cannot open '%s' path", output_path); |
| 908 | return -1; |
| 909 | } |
| 910 | output_dir_fd = dirfd(output_dir); |
| 911 | if (output_dir_fd < 0) { |
| 912 | PERROR("dirfd"); |
| 913 | return -1; |
| 914 | } |
| 915 | |
| 916 | while ((entry = readdir(input_dir))) { |
| 917 | if (!strcmp(entry->d_name, ".") |
| 918 | || !strcmp(entry->d_name, "..")) |
| 919 | continue; |
| 920 | ret = extract_file(output_dir_fd, entry->d_name, |
| 921 | input_dir_fd, entry->d_name); |
| 922 | if (ret == -ENODATA) { |
| 923 | DBG("No data in file '%s', skipping", entry->d_name); |
| 924 | ret = 0; |
| 925 | continue; |
| 926 | } else if (ret < 0) { |
| 927 | break; |
| 928 | } else if (ret > 0) { |
| 929 | DBG("Skipping file '%s'", entry->d_name); |
| 930 | ret = 0; |
| 931 | continue; |
| 932 | } |
| 933 | } |
| 934 | closeret = closedir(output_dir); |
| 935 | if (closeret) { |
| 936 | PERROR("closedir"); |
| 937 | } |
| 938 | closeret = closedir(input_dir); |
| 939 | if (closeret) { |
| 940 | PERROR("closedir"); |
| 941 | } |
| 942 | return ret; |
| 943 | } |
| 944 | |
| 945 | static |
| 946 | int extract_one_trace(const char *output_path, |
| 947 | const char *input_path) |
| 948 | { |
| 949 | char dest[PATH_MAX], src[PATH_MAX]; |
| 950 | int ret; |
| 951 | |
| 952 | DBG("Extract crash trace '%s' into '%s'", input_path, output_path); |
| 953 | |
| 954 | /* Copy metadata */ |
| 955 | strncpy(dest, output_path, PATH_MAX); |
| 956 | dest[PATH_MAX - 1] = '\0'; |
| 957 | strncat(dest, "/metadata", PATH_MAX - strlen(dest) - 1); |
| 958 | |
| 959 | strncpy(src, input_path, PATH_MAX); |
| 960 | src[PATH_MAX - 1] = '\0'; |
| 961 | strncat(src, "/metadata", PATH_MAX - strlen(dest) - 1); |
| 962 | |
| 963 | ret = copy_file(dest, src); |
| 964 | if (ret) { |
| 965 | return ret; |
| 966 | } |
| 967 | |
| 968 | /* Extract each other file that has expected header */ |
| 969 | return extract_all_files(output_path, input_path); |
| 970 | } |
| 971 | |
| 972 | static |
| 973 | int extract_trace_recursive(const char *output_path, |
| 974 | const char *input_path) |
| 975 | { |
| 976 | DIR *dir; |
| 977 | int dir_fd, ret = 0, closeret; |
| 978 | struct dirent *entry; |
| 979 | size_t path_len; |
| 980 | int has_warning = 0; |
| 981 | |
| 982 | /* Open directory */ |
| 983 | dir = opendir(input_path); |
| 984 | if (!dir) { |
| 985 | PERROR("Cannot open '%s' path", input_path); |
| 986 | return -1; |
| 987 | } |
| 988 | |
| 989 | path_len = strlen(input_path); |
| 990 | |
| 991 | dir_fd = dirfd(dir); |
| 992 | if (dir_fd < 0) { |
| 993 | PERROR("dirfd"); |
| 994 | return -1; |
| 995 | } |
| 996 | |
| 997 | while ((entry = readdir(dir))) { |
| 998 | struct stat st; |
| 999 | size_t name_len; |
| 1000 | char filename[PATH_MAX]; |
| 1001 | |
| 1002 | if (!strcmp(entry->d_name, ".") |
| 1003 | || !strcmp(entry->d_name, "..")) { |
| 1004 | continue; |
| 1005 | } |
| 1006 | |
| 1007 | name_len = strlen(entry->d_name); |
| 1008 | if (path_len + name_len + 2 > sizeof(filename)) { |
| 1009 | ERR("Failed to remove file: path name too long (%s/%s)", |
| 1010 | input_path, entry->d_name); |
| 1011 | continue; |
| 1012 | } |
| 1013 | |
| 1014 | if (snprintf(filename, sizeof(filename), "%s/%s", |
| 1015 | input_path, entry->d_name) < 0) { |
| 1016 | ERR("Failed to format path."); |
| 1017 | continue; |
| 1018 | } |
| 1019 | |
| 1020 | if (stat(filename, &st)) { |
| 1021 | PERROR("stat"); |
| 1022 | continue; |
| 1023 | } |
| 1024 | |
| 1025 | if (S_ISDIR(st.st_mode)) { |
| 1026 | char output_subpath[PATH_MAX]; |
| 1027 | char input_subpath[PATH_MAX]; |
| 1028 | |
| 1029 | strncpy(output_subpath, output_path, |
| 1030 | sizeof(output_subpath)); |
| 1031 | output_subpath[sizeof(output_subpath) - 1] = '\0'; |
| 1032 | strncat(output_subpath, "/", |
| 1033 | sizeof(output_subpath) - strlen(output_subpath) - 1); |
| 1034 | strncat(output_subpath, entry->d_name, |
| 1035 | sizeof(output_subpath) - strlen(output_subpath) - 1); |
| 1036 | |
| 1037 | ret = mkdir(output_subpath, S_IRWXU | S_IRWXG); |
| 1038 | if (ret) { |
| 1039 | PERROR("mkdir"); |
| 1040 | has_warning = 1; |
| 1041 | goto end; |
| 1042 | } |
| 1043 | |
| 1044 | strncpy(input_subpath, input_path, |
| 1045 | sizeof(input_subpath)); |
| 1046 | input_subpath[sizeof(input_subpath) - 1] = '\0'; |
| 1047 | strncat(input_subpath, "/", |
| 1048 | sizeof(input_subpath) - strlen(input_subpath) - 1); |
| 1049 | strncat(input_subpath, entry->d_name, |
| 1050 | sizeof(input_subpath) - strlen(input_subpath) - 1); |
| 1051 | |
| 1052 | ret = extract_trace_recursive(output_subpath, |
| 1053 | input_subpath); |
| 1054 | if (ret) { |
| 1055 | has_warning = 1; |
| 1056 | } |
| 1057 | } else if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) { |
| 1058 | if (!strcmp(entry->d_name, "metadata")) { |
| 1059 | ret = extract_one_trace(output_path, |
| 1060 | input_path); |
| 1061 | if (ret) { |
| 1062 | WARN("Error extracting trace '%s', continuing anyway.", |
| 1063 | input_path); |
| 1064 | has_warning = 1; |
| 1065 | } |
| 1066 | } |
| 1067 | } else { |
| 1068 | has_warning = 1; |
| 1069 | goto end; |
| 1070 | } |
| 1071 | } |
| 1072 | end: |
| 1073 | closeret = closedir(dir); |
| 1074 | if (closeret) { |
| 1075 | PERROR("closedir"); |
| 1076 | } |
| 1077 | return has_warning; |
| 1078 | } |
| 1079 | |
| 1080 | static |
| 1081 | int delete_dir_recursive(const char *path) |
| 1082 | { |
| 1083 | DIR *dir; |
| 1084 | int dir_fd, ret = 0, closeret; |
| 1085 | size_t path_len; |
| 1086 | struct dirent *entry; |
| 1087 | |
| 1088 | /* Open trace directory */ |
| 1089 | dir = opendir(path); |
| 1090 | if (!dir) { |
| 1091 | PERROR("Cannot open '%s' path", path); |
| 1092 | ret = -errno; |
| 1093 | goto end_no_closedir; |
| 1094 | } |
| 1095 | |
| 1096 | path_len = strlen(path); |
| 1097 | |
| 1098 | dir_fd = dirfd(dir); |
| 1099 | if (dir_fd < 0) { |
| 1100 | PERROR("dirfd"); |
| 1101 | ret = -errno; |
| 1102 | goto end; |
| 1103 | } |
| 1104 | |
| 1105 | while ((entry = readdir(dir))) { |
| 1106 | struct stat st; |
| 1107 | size_t name_len; |
| 1108 | char filename[PATH_MAX]; |
| 1109 | |
| 1110 | if (!strcmp(entry->d_name, ".") |
| 1111 | || !strcmp(entry->d_name, "..")) { |
| 1112 | continue; |
| 1113 | } |
| 1114 | |
| 1115 | name_len = strlen(entry->d_name); |
| 1116 | if (path_len + name_len + 2 > sizeof(filename)) { |
| 1117 | ERR("Failed to remove file: path name too long (%s/%s)", |
| 1118 | path, entry->d_name); |
| 1119 | continue; |
| 1120 | } |
| 1121 | |
| 1122 | if (snprintf(filename, sizeof(filename), "%s/%s", |
| 1123 | path, entry->d_name) < 0) { |
| 1124 | ERR("Failed to format path."); |
| 1125 | continue; |
| 1126 | } |
| 1127 | |
| 1128 | if (stat(filename, &st)) { |
| 1129 | PERROR("stat"); |
| 1130 | continue; |
| 1131 | } |
| 1132 | |
| 1133 | if (S_ISDIR(st.st_mode)) { |
| 1134 | char *subpath = calloc<char>(PATH_MAX); |
| 1135 | |
| 1136 | if (!subpath) { |
| 1137 | PERROR("zmalloc path"); |
| 1138 | ret = -1; |
| 1139 | goto end; |
| 1140 | } |
| 1141 | strncpy(subpath, path, PATH_MAX); |
| 1142 | subpath[PATH_MAX - 1] = '\0'; |
| 1143 | strncat(subpath, "/", |
| 1144 | PATH_MAX - strlen(subpath) - 1); |
| 1145 | strncat(subpath, entry->d_name, |
| 1146 | PATH_MAX - strlen(subpath) - 1); |
| 1147 | |
| 1148 | ret = delete_dir_recursive(subpath); |
| 1149 | free(subpath); |
| 1150 | if (ret) { |
| 1151 | /* Error occurred, abort traversal. */ |
| 1152 | goto end; |
| 1153 | } |
| 1154 | } else if (S_ISREG(st.st_mode)) { |
| 1155 | ret = unlinkat(dir_fd, entry->d_name, 0); |
| 1156 | if (ret) { |
| 1157 | PERROR("Unlinking '%s'", entry->d_name); |
| 1158 | goto end; |
| 1159 | } |
| 1160 | } else { |
| 1161 | ret = -EINVAL; |
| 1162 | goto end; |
| 1163 | } |
| 1164 | } |
| 1165 | end: |
| 1166 | if (!ret) { |
| 1167 | ret = rmdir(path); |
| 1168 | if (ret) { |
| 1169 | PERROR("rmdir '%s'", path); |
| 1170 | } |
| 1171 | } |
| 1172 | closeret = closedir(dir); |
| 1173 | if (closeret) { |
| 1174 | PERROR("closedir"); |
| 1175 | } |
| 1176 | end_no_closedir: |
| 1177 | return ret; |
| 1178 | } |
| 1179 | |
| 1180 | static |
| 1181 | int view_trace(const char *trace_path, char *viewer_path) |
| 1182 | { |
| 1183 | pid_t pid; |
| 1184 | |
| 1185 | pid = fork(); |
| 1186 | if (pid < 0) { |
| 1187 | /* Error */ |
| 1188 | PERROR("fork"); |
| 1189 | return -1; |
| 1190 | } else if (pid > 0) { |
| 1191 | /* Parent */ |
| 1192 | int status; |
| 1193 | |
| 1194 | pid = waitpid(pid, &status, 0); |
| 1195 | if (pid < 0 || !WIFEXITED(status)) { |
| 1196 | return -1; |
| 1197 | } |
| 1198 | } else { |
| 1199 | /* Child */ |
| 1200 | int ret; |
| 1201 | |
| 1202 | ret = spawn_viewer(trace_path, viewer_path, false); |
| 1203 | if (ret) { |
| 1204 | exit(EXIT_FAILURE); |
| 1205 | } |
| 1206 | /* Never reached */ |
| 1207 | exit(EXIT_SUCCESS); |
| 1208 | } |
| 1209 | return 0; |
| 1210 | } |
| 1211 | |
| 1212 | /* |
| 1213 | * main |
| 1214 | */ |
| 1215 | int main(int argc, char *argv[]) |
| 1216 | { |
| 1217 | int ret; |
| 1218 | bool has_warning = false; |
| 1219 | const char *output_path = NULL; |
| 1220 | char tmppath[] = "/tmp/lttng-crash-XXXXXX"; |
| 1221 | |
| 1222 | progname = argv[0] ? argv[0] : "lttng-crash"; |
| 1223 | |
| 1224 | ret = parse_args(argc, argv); |
| 1225 | if (ret > 0) { |
| 1226 | goto end; |
| 1227 | } else if (ret < 0) { |
| 1228 | has_warning = true; |
| 1229 | goto end; |
| 1230 | } |
| 1231 | |
| 1232 | if (opt_output_path) { |
| 1233 | output_path = opt_output_path; |
| 1234 | ret = mkdir(output_path, S_IRWXU | S_IRWXG); |
| 1235 | if (ret) { |
| 1236 | PERROR("mkdir"); |
| 1237 | has_warning = true; |
| 1238 | goto end; |
| 1239 | } |
| 1240 | } else { |
| 1241 | output_path = mkdtemp(tmppath); |
| 1242 | if (!output_path) { |
| 1243 | PERROR("mkdtemp"); |
| 1244 | has_warning = true; |
| 1245 | goto end; |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | ret = extract_trace_recursive(output_path, the_input_path); |
| 1250 | if (ret < 0) { |
| 1251 | has_warning = true; |
| 1252 | goto end; |
| 1253 | } else if (ret > 0) { |
| 1254 | /* extract_trace_recursive reported a warning. */ |
| 1255 | has_warning = true; |
| 1256 | } |
| 1257 | if (!opt_output_path) { |
| 1258 | /* View trace */ |
| 1259 | ret = view_trace(output_path, opt_viewer_path); |
| 1260 | if (ret) { |
| 1261 | has_warning = true; |
| 1262 | } |
| 1263 | /* unlink temporary trace */ |
| 1264 | ret = delete_dir_recursive(output_path); |
| 1265 | if (ret) { |
| 1266 | has_warning = true; |
| 1267 | } |
| 1268 | } |
| 1269 | end: |
| 1270 | exit(has_warning ? EXIT_FAILURE : EXIT_SUCCESS); |
| 1271 | } |